Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
See 1 Answer
Marks recorded wrong were 50 and 70
Actual marks were 80 and 60
Total marks as recorded wrongly
= 40 x 85
= 3400
Actual total = 3400-50-70+80+60
= 3420
Actual average = 3420 / 40 = 85.5 marks
Hope this helps
Actual marks were 80 and 60
Total marks as recorded wrongly
= 40 x 85
= 3400
Actual total = 3400-50-70+80+60
= 3420
Actual average = 3420 / 40 = 85.5 marks
Hope this helps